Because they steal all the men away from them. They need the men of the Farms to believe that there is no alternatives to women like them. They view these women as competition for male attention which I find funny given how much they say they hate men to a murderous degree. Especially Jambled given that she is a nymphomaniac who can't go a second without begging for dick and attention. I reckon that this has to do with them having very bad self-esteem issues. They may hate men but at the same time deeply crave the validation they believe that only a man can give them.